1 dnl Copyright 2003,2008,2009 Free Software Foundation, Inc.
3 dnl This file is part of GNU Radio
5 dnl GNU Radio is free software; you can redistribute it and/or modify
6 dnl it under the terms of the GNU General Public License as published by
7 dnl the Free Software Foundation; either version 3, or (at your option)
10 dnl GNU Radio is distributed in the hope that it will be useful,
11 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
12 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 dnl GNU General Public License for more details.
15 dnl You should have received a copy of the GNU General Public License
16 dnl along with GNU Radio; see the file COPYING. If not, write to
17 dnl the Free Software Foundation, Inc., 51 Franklin Street,
18 dnl Boston, MA 02110-1301, USA.
21 # yes : check libusb-1.0
22 # no : check libusb-0.12
23 # "" : check libusb-0.12
26 AC_DEFUN([USRP_LIBUSB], [
27 dnl Use PKGCONFIG to check for packages first, then check to
28 dnl make sure the USB_* variables work (whether from PKGCONFIG
29 dnl or overridden by the user)
33 LIBUSB_PKG_CONFIG_NAME=''
34 if test x$1 = xyes; then
35 PKG_CHECK_MODULES(USB, libusb-1.0, [
38 usb_header='libusb-1.0/libusb.h'
39 usb_lib_func='libusb_bulk_transfer'
40 usb_lib_name='usb-1.0'
41 LIBUSB_PKG_CONFIG_NAME='libusb-1.0'
44 dnl not using libusb1 (for now); see if legacy version is found.
45 dnl it might be installed under the name either 'libusb' or
46 dnl 'libusb-legacy', or just available via the
47 dnl user's shell environment
49 dnl see if the pkgconfig module 'libusb' is available
50 PKG_CHECK_MODULES(USB, libusb, [
52 LIBUSB_PKG_CONFIG_NAME='libusb'
54 dnl PKG_CHECK_MODULES does not work correctly when embedded
55 if test $libusbok = no; then
56 dnl if not, see if the pkgconfig module 'libusb-legacy' is available
57 PKG_CHECK_MODULES(USB, [libusb-legacy], [
59 LIBUSB_PKG_CONFIG_NAME='libusb-legacy'
62 dnl set variables for further testing
64 usb_lib_func='usb_bulk_write'
67 AC_SUBST(LIBUSB_PKG_CONFIG_NAME)
68 if test x$1 != xyes || test $have_libusb1 = yes; then
69 dnl Either (1) libusb1 was specified and found; or
70 dnl (2) libusb1 was not specified. Restart checking.
73 dnl Verify that $usb_header is a valid header, and if so,
74 dnl then verify that $usb_lib_func can be found in the
75 dnl library $usb_lib_name.
77 dnl If PKGCONFIG found variable USB_INCLUDEDIR, and it is
78 dnl not empty, use it for checking for $usb_header.
79 dnl Otherwise, maybe the user's shell environment is already
80 dnl configured to find this header.
83 save_CPPFLAGS="$CPPFLAGS"
84 if test x$USB_INCLUDEDIR != x; then
85 USB_INCLUDES="-I$USB_INCLUDEDIR"
86 CPPFLAGS="$CPPFLAGS $USB_INCLUDES"
87 AC_SUBST(USB_INCLUDES)
89 AC_CHECK_HEADERS([$usb_header], [], [libusbok=no])
90 CPPFLAGS="$save_CPPFLAGS"
93 if test $libusbok = no; then
94 AC_MSG_RESULT([USRP requires libusb header '$usb_header' which was not found or was not usable. See http://www.libusb.org])
97 dnl found the header; now make sure the library is OK
98 dnl On Darwin, need to include the IOKit library.
105 USB_LIBS="$USB_LIBS -lIOKit"
110 AC_CHECK_LIB([$usb_lib_name], [$usb_lib_func], [], [
112 AC_MSG_RESULT([USRP requires library '$usb_lib_name' with function '$usb_lib_func', which was either not found or was not usable. See http://www.libusb.org])
124 if test $libusbok = yes; then
126 ifelse([$2], , :, [$2])
130 ifelse([$3], , :, [$3])